Family name Janša (扬沙 
, Янша 
, Janša 
) , globally, is a rare surname. The cognomen Janša is habitual in Slovenia, where it is quite a rare surname, Czechia, where it is a rare surname, and Croatia, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in Slovenia, Czechia, and Russia. Very seldom, Janša is the forename as well as the last name.
| valentin janša SI (b. 1747) |
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| klemen janša botanist (1825-1854), SI (b. 1825) |
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joško janša Slovenian cross-country skier, SI (b. 1900) |
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janko janša Slovenian cross-country skier, SI (b. 1900) |
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janez janša Slovenian politician, SI (b. 1958) |
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janez janša Croatian theatre director, SI (b. 1964) |
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janez janša Italian performance artist, IT (b. 1970) |
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| tone janša Slovenian jazz musician and music teacher, SI (b. 1943) |
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| miloš janša Slovenian rower, SI (b. 1950) |
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| vincenc janša SI (b. 1950) |
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| milan janša Slovenian rower, SI (b. 1965) |
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| janez janša Slovenian painter, SI (b. 1973) |
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| janez janša entrepreneur |
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| gašper janša SI (b. 1979) |
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| matjaž janša SI |
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